At Shinobi Gakuen, Himawari Hinata is pursuing her dream of becoming a skilled kunoichi. From childhood, she has admired the ninja who once saved her life. She crosses paths with Hayato Madenokoji, a new teacher who lacks ninja abilities but imparts knowledge on normal society to repay a debt. Interestingly, Himawari observes that Hayato bears the same mark on his neck as her savior from years ago.